I currently have a 600 holley VS elec choke (choke removed)
its had several backfires and doesnt seem to run exactly right, maybe powervalve blown.It leaked down the other day and filled #7 with gas. edelbrock performer intake, mr gasket spread bore/ square bore adapter.. I would like to buy a new intake with a square bore. I am planning on getting a refund on this carb to fund a new one. I was looking at the edelbrock performer EPS, and a barry grant road demon 625 VS. car is 85 camaro with a 307 sbc, stock TC and 700r. would the 625 be too much, how are demons jetted from the factory? im looking for the best combo of intake+carb, sorry I dont know cam specs.

 

Get the Demon.

 

Do not under any circumstances repair the holley 600.By all means buy new and when that is out of tune for your combination,BUY MORE NEW STUFF. That way there will be all these aftermarket carbs that I can pickup dirt cheap,repair and then use or sell.But seriously......Tune the carb you have,you will most likely learn something and will SAVE MONEY.Then what you have learned will serve you well in the future,the learning experience is alone worth the cost of new stuff only it comes at just the cost of the repair parts...........Good Luck

 

I like your idea... but I wouldnt save that much money.. the demon is $339 free shipping, parts to rebuild my 600 totally would be about $50 im guessing not including any jet changes I may need... If I get my $220 back from my POS 600 then it would be less than $100 savings and still an ugly *** carb lol. plus the time and frustration of the carb not working the first time I rebuild it .. then all the things I break because of that lol.

 

I didn't know that cosmetics were part of the deal............and I have never seen thru an air cleaner.Kit for 1850-? is about 30.00 2 cans B12 5.00 you do the math .........my work is done here.......Later

 

Get the edelbrock and be happy

 

You're an Edel. fan too, eh General?

 

So am I, actually. I've loved AFB's forever.

 

Edelbrock carb fan here too.

My 88 camaro runs high 12's at 118 MPH ( bad traction prob) with a mild 355 and 600 cfm eddy. carb

Been useing the AFB, and edelbrock carbs for about 7 years on all kinds of combos

 

Chris5K,

If you're wanting to change carburetors a 625 Road Demon should work extremely well on a combination like yours. That being said ALL carburetors will need to be tuned, or set up to your specific combination. If you're engine is backfiring through the carburetor, there is something out of tune. Keep that in mind regardless of what carburetor you are using.

 

Although I'm glad to see that you're willing to visit this board and give recommendations on carb size, I feel inclined to share my experience with the tech guys at BG. I'd love to be able to say the experience was positive, but I'd be lying.

I called BG techline to get recommendations on what size carb I should run when I built the 400 I presently have in my car. I told the tech. rep all the info he asked for pertaining to my engine setup, which included things such as cam duration, compression, etc. The info I gave the rep was pretty much in line with what is asked for on thier website form you can fill out and email to them. I elected to call them on the phone to get a recommendation instead of waiting for a electronic form.

Well, the recommendation I got from the reps at Demon was a 650 cfm Speed Demon carb. I had never heard of running such a small carb on a 400, so I questioned his recommendation and we went through all my engine specs again and he again said that a 650 should be sufficient and he pointed out that Demon carbs are flow tested differently from Holley carbs. So I purchased the carb that was recommended.

Long story short, the carb had to be jetted way up in order to keep exhaust gas temps at bay during the engine dyno by more than 8 jet sizes, and both me and the engine builder thought maybe the carb was indeed to small for my application.

I called the techline back and spoke to a different tech gut this time, and I told him about the problems I was having getting it to run right, and the first thing out of his mouth was "you should have a 750 cfm carb on that". That's not what you want to hear after spending 300 plus dollars on a brand new, wrong sized carb.

Now I'm stuck looking for a bigger carb. Needless to say, it probably won't be a Demon. I trusted them and got screwed. I'm not trying to bash the tech rep that responded to this post because he may know what he is talking about, but I lost all faith on thier "recommendations". It's unfortunate because they seem to make a good product. I've had this carb for less than a year and have the original box it came in (hint-hint)...

If you have the power to rectify this situation BG @ Tech, please feel free to respond here or email me.

 

Confuzed1,

First off we’d like to apologize for any miscommunication. It would not have been intentional, but a lot of the times a recommendation can change depending upon the interpretation of the technician based upon how a customer tells us something, or what we may think they are wanting. As a quick example if a customer calls or e-mails us two separate times with the same combination, but one time states, or it is interpreted that they want more bottom end or throttle response the recommendation may be smaller than the other recommendation in order to be able to accomplish this.

As far as your combination goes, and your specific situation with having to jet up on the carburetor, there is something there not making sense. Carburetors work based upon air velocity, meaning if you put a larger carburetor on the same engine it should actually run leaner. If you’ll contact our office directly at (706) 864-8544 we may be able to go through this in further detail to see if we can help with your specific situation.

Thank you,

 

Thanks for your quick reply BG! You have a PM!

 

Thanks for the recommendation BG.. I will try to get my money back on the holley now and look into the Demon, probably off ebay. $339 and free shipping. Thanks to everyone else for the advice also, I dont know why but I dont like edelbrocks.. I know people have used them for years and had no problems, maybe because my dad always used holleys.. just one of those things